With one knee resting on the floor, tighten your core muscles - including the muscles in your abdomen, back and pelvis - and lift the object between your legs.
单膝着地，收紧你的核心肌肉——包括腹部、背部和骨盆的肌肉，然后在两腿之间抬起物品。
With one knee resting on the floor, tighten your core muscles - including the muscles in your abdomen, back and pelvis - and lift the object between your legs.
单膝着地，收紧你的核心肌肉——包括腹部、背部和骨盆的肌肉，然后在两腿之间抬起物品。
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